Type-writing machine.



Ef E. BARNEY. TYPE WBITING'MAGHINE.

Y APPLICATIONTILED AUG. 16, 1905. 923, 106, Patented May 25,1909. 2SHEETS-SHEET 1.

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E. E. BARNEY. TYP WRITING MACHINE.

l APPLICATION FILED AUG. 16, 1905. 923, 106, v Patented May 25, 1909.

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UNITED STATES TATENT OFFICE.

EDWIN E. BARNEY, OF ISYRACUSE, NEW YORK, ASSIGNOR TO THE MONARCHTYPEWRITER COMPANY, OF SYRACUSE, NEW YORK, A CORPORATION OF NEW YORK.

TYPE-WRITING MACHINE Application filed August 16, 1905.

To all whom "it may concern:

Be it known that I, EDWIN E. BARNEY, citizen of the United States, andresident of Syracuse, in the county of Onondaga and State of New York,have invented certain new and useful Improvements in Type- VifritingMachines, of which the following is a specification.

My invention relates more especially to the carriage feeding mechanismof typewriting machines embodying an escapement wheel, and has for oneof its objects to provide a back stop (that is, a stop for preventing areverse or backward movement of the escapement wheel when the carriageis returned from left to right to begin a new line of writing) of thegeneral character of that shown in the U.- S. patent to Carl Gabrielson,No. 717,?a37, dated January 6th, 1903, in connection with a reverse feedescapement, that is, an escapement by which the carriage is permitted tofeed in letter space direction during the depression of a space key orprinting key.

Another object of the invention is to provide an improved constructionof reverse feed escapement.

Other objects will subsequently appear.

To these ends the invention resides in the features of construction,combinations of devices and arrangements of parts to be hereinafterfully described and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is vertical front to rearsectional view, taken about centrally, of so much of a typewritingmachine as is necessary to a clear understanding of my invention. Fig. 2is an enlarged fragmentary sectional view taken on a plane representedby the line x-x of Fig. 1. Fig. 3 is an enlarged elevation of the`d0gcarrier or rocker and the )arts mounted thereon, as viewed from the leftside of the machine. VFig. 4 is a view corresponding` to Fig. 3, buttaken from the opposite or right side of the machine. F ig. 5 is a topplan view of the parts shown in Figs. 3 and 4. Fig. 6 is an enlargedrear elevation of the dog carrier and its associate parts, some of whichare broken away for the sake of clearness, said view also showing thelower portion of the escapement wheel. Fig. 7 is an enlarged fragmentaryrear elevation of the combined forward or holding dog and escapementwheel stop, together with Specification of Letters Patent.

Patented May 25, 1909.

Serial N0. 274,407.

the lower portion of the escapement wheel, the escapement wheel stopbeing shown in arresting position. Fig. 8 is an enlarged perspectiveview of the combined holding dog and escapement wheel stop. Fig. 9 is anenlarged perspective view of the rear or stepping dog; and Figs. 10, 11and 12 are diagrammatic views illustrating the various relations betweenthe escapement dogs and the teeth of the esca ement wheel.

My invention is il ustrated as applied to a machine having the generalcharacteristics of the Monarch typewriter, although diifering from thelatter somewhat in detail. It is to be understood, however, that theinvention may be adapted to other forms of writing machines.

In the drawings, the framework of the niachine is shown as comprising abase 1, corner posts 2 and a top `late 3. Key levers 4 are fulcrumed ona fu cruin plate 5 fixed at the rear of the base. Pivoted at 6 to eachkey lever is a sub-lever 7 the lower portion whereof is slotted tocooperate with a fixed abutment 8 and the upper end whereof is connectedby a link 9 with a type bar 10 which i is one of a series of type barsmoimted on a segmental type bar support 11. The type bars may, as hereinshown, each be arranged in a radial slot 12 in said support and pivotedon a segmental fulcrum wire 13, or said type bars may be mounted in anyother suitable manner. T he type bars are adapted to cooperate with thefront face of a cylindrical platen 14 mounted on an axle 15 having itsends pivotally supported in side bars 16 projecting forwardly from aback bar 17, the side bars 16 and back bar 17 comprising the platencarrier. The top and bottom faces of the back bar 17 are formed withlongitudinal grooves which receive anti-friction balls 18, said ballsalso cooperating with grooves formed in fixed rails 19 and 20 secured tostandards 21 mounted on the top plate 3.

A carriage feed rack 22 of the usual construction is carried by theplaten carrier and normally meshes with a feed pinion 23 fixed at theforward or front end of a short shaft 24, which has its bearings in abracket 25 fixed to the top plate of the machine. A feed or escapementwheel 26 is looselymounted on the rear portion of the shaft 24 and hassecured to its rear face a ratchet wheel 27. Engaging the teeth of theratchet wheel 27 are spring pawls 28 secured to a housing 29 which isfixed by means of screws 30 to the rear end of the shaft 24. li'Vhen thecarriage is fed in letter space direction it will be unj derstood thatthe engagement of the pawls l 28 with the ratchet Wheel 27 will causethe capeinent wheel 26. It will, of course, be understood that if duringthe movement of the carriage in either direction the feed rack 22 isdisengaged or separated from the feed pinion 23, neither the shaft 24 orescapenient i The arrangement wheel 26 will be affected.

and construction of the parts hitherto de- 2 scribed is not novel and itis thought unnecessary to explain them in greater detail.

shaft 31, a vertically disposed arm 32 and a in ears 35 extendingrearwardlyT from a bracket 36 depending from the top plate. The dogrocker is provided with the usual reentering edge of the dog and theplane of the bevel intersecting the plane of the back of the dog. Saidrear dog has secured to it as by a rivet 52 a strap 53 which has itsrear end bent around the dog so as to prevent any turning of the strap53 on its rivet. The free or forward end of the strap 53 is adapted tocontact with the forward dog 44. As seen in Fig. 1, the forward end ofthe arm 33 of the dog rocker is connected by a link 54 with a universalbar frame having a pivot-rod 56 supported in the sides of the base l andcarrying a universal bar 57 which extends from side to side of themachine beneath the series of key levers.

Depending from the platen carrier is a stud 58 which is connected by astrap 59 with a spring drum of ordinary construction, said spring drumcontaining a carriage j main spring which constantly tends to draw A dogcarrier or rocker comprising a rock contact with the bracket 36 to limitthe forward movement of the rocker, while the arm 1 33 is provided withan adjustable screw stop movement of said rocker.

the platen carrier and platen leftward across j the top plate of themachine. horizontally disposed arm 33 is pivoted at 34 i ii As thertostated the dog rocker is normally maintained in the position indicatedin Fig. 1, from an inspection of which it will be noted that the forwarddog 44 is normally engaged with one of the teeth of the escapement wheel26. Fig. 6 also shows this normal engagement of the parts which isfurther diagrammatically illustrated in Fig. 10,

wherein the tooth of the escapement wheel 39 which is adapted to contactwith the botf tom of the bracket 36 to limit the rearward 1 Normally there- 4 storinD` spring 37 maintains the dog rocker in i the positionillustrated in Fig. 1 with the liniiting stop 39 in contact with thebracket 36.

carrier or rocker is provided with ears or lugs the machine, projecttoward the right from the right-hand face of the arm 32. The ears dogs44 and 45, the forward dog being arranged between tlie ears 41 and 42and the rear dog 45 between the ears 4() and 41. rlhe inner faces of thedogs above the pivots are provided with studs or pins 46 and 47, aboutwhich are coiled light wire springs 48 and 49 housed in depressionsformed in the arm 32 of the rocker. Said springs tend constantly topress the upper arms of the dogs away from the face of the dog -rockerand to hold the tails 44a and 45at of said dogs in contact with the faceof the dog rocker.

with which the dog 44 is engaged is indicated by the reference characterl) and the next succeeding tooth by c. The main spring tends to turn theescapenient wheel 26 in the direction of the arrow in Fig. 6 and issufficient i to overcome the force of the dog spring 48, Near its upperend the arm 32 of the dog compressing the latter until the upper arm lof the dog 44 contacts with the arm 32 of the 40, 41 and 42, which,viewed from the rear of dog rocker, as indicated in said Fig. 6. it is lapparent from an inspection of said figure j that in this position ofthe dog 44 the stop 51 are perforated to receive a short shaft 43 whichserves as a pivot for two escapenient forward dog 44 has an arni 50projecting leftj Ward from near its upper end, as viewed from r providedwith a clearance bevel 45b at its ene i tering edge, Wliereby said edgeis made thinner than the remaining part of the dog; the

direction of the bevel being at an angle to the l is out of the path ofthe teeth of the escapenient wheel.

The operation of the escapenient mechanism to permit of the letter spacefeeding movement of the platen and platen carrier will new be described.When any key lever 4 is adequately depressed, the type bar associatedwith the depressed key lever is caused to swing upwardly to cooperatewith the platen in a known niaiiner, and at the same time said keylever, contacting with the universal bar 57, will swing the latterdownwardly about its pivots, causing the downward movement of the link54 and swinging the dog rocker forward from the position indicated inFig. 1, until the limiting stop 38 contacts with the rear face of thebracket 36. As the dog rocker moves forward the front or holding dogmoves for ward out of contact with the tooth l) of the escapeinent wheel26. As soon as it is free from the escapeinent wheel the dog 44 will,under the influence of the dog spring 48, be

swung away from the face of the arm 32 of the dog rocker, the movementof the dog continuing until its tail 44 a contacts with said arm 32. Theparts are so proportioned and adjusted that as the tail of the dog 44contacts with the arm of the dog rocker the part of said dog between itspivot and its working face will contact with the strap or arm 53 iixedto the rear dog 45.

From an inspection of Fig. 6 it will be noted that the rear or steppingdog is normally maintained by the dog spring 49 away from the face ofthe vertical arm of the dog rocker and with the tail 45a of said dog incontact with said vertical arm. The normal position of the stepping dog45 is such that during the forward movement 'of the dog rocker said dogwill move forward to the right of the engaged tooth b of the escapementwheel (considered from the rear of the machine), the clearance bevel 45bpermitting the dog 45 to pass readily behind the tooth b, so that assoon as the dog 44 has been carried by the dog rocker forward out ofcontact with the tooth b the escapement wheel 2b will be turned underthe influence of the main spring in the direction of the arrow in Fig.6. The rotary movement of the escapement wheel will bring the neXtsucceeding tooth c into contact with the stepping dog 45 and overcomingthe tension of the dog spring 49, will swing the dog 45 about its pivot43 until said dog contacts with the arm 32 of the dog rocker. Thisswinging movement of the stepping deg 45 will be transmitted through thestrap or arm 53 to the holding dog 44, causing the latter to movesimultaneously with the stepping dog 45 until it is brought to a stopagainst the arm 32 of the rocker. The two dogs will, at the terminationof the forward movement of the dog rocker, be in the positionillustrated in Fig. ll with their werking faces in the same plane, whichis also the plane of the working face of the tooth c of the escapementwheel. 1t will be apparent that the latter has, during the forwardmovement of the dog rocker, escaped or moved one tooth in letter spacedirection, thereby permitting the platen carrier and platen to move aletter space distance under the pull of the main spring. The escapementdevices are also operated in the manner above described when the spacebar (not shown) is depressed. Y

When the depressed printing hey 4 or the space bar is released, the dogrocker will be swung back to normal position under the influence of itsrestoring spring 37. As soon as the stepping dog 45 has moved far enoughto the rear to pass out of contact with the tooth c of the escapementwheel, it will be swung away from the dog rocker by the dog spring 49and will assume the position indicated in Fig. 12. Before thedisengagement of the stepping dog 45 from the tooth c, the

holding dog 44 moves rearwardly into engagement with said tooth somovement of the escapement wheel is prevented when the stepping dog 45disengages. The position of the parts at the termination of the rearwardmovement of the dog rocker is indicated in 1* ig. l2 and it will benoted from an inspeetion of said iigure that the escapement meinbers areagain in a relation corresponding to that illustrated in ligs. 6 and l0,except for the fact that the tooth c has taken the place occupied by thetooth b in said last mentioned iigures.

When the escapement members are in normal relation, if the carriage beretracted from left to right, as to begin a new line, the pull of themain spring is withdrawn from the escapement wheel 26, and the frictionof the connecting parts, such as that between the pawls 2S and ratchetwheel 27, would, but, for my present invention, turn the escapementwheel in the reverse direction, as indicated by the arrow in Big. 7.rlhis reverse movement of the escapement wheel is assisted te someslight degree by the dog spring 48 which moves the dog 44 to theposition indicated in rig. 7 as soon as the reverse movement of theescapement wheel has proceeded far enough to permit. 'from an inspectionof E; ig. 7 it will be observed that the movement of the dog 44 underthe influence of the spring 4S has brought the stop 5l into the path ofthe teeth of the escapement wheel, the back faces of said teeth asindicated at 26a, being cut on an are struck from the short shaft 43 asa center, so as to permit a ready entrance of the stop 51 into the pathof the teeth, and so that said stop intercepts the escapement wheel andprevents reverse movement thereof', as indicated in said 7. The backface of the tooth e of the escapement wheel, which tooth is the oneimmediately te the left (as viewed in Fig. 7 of the engaged toothcontacts with the stop 5l which is prevented from turning farther to theright about the pivot 43 because of the contact of the tail 44a of thedog 44 with the arm 32 of the dog rocker.'

1t will be seen that 1 have provided a carriage feeding mechanismwherein the holding member of the escapement mechanism, that is, the dog44, is normally in engagement with the toothed escapement member, that lis, the escapement wheel 26, and that when said dog 44 is disengagedfrom one tooth of the escapement wheel Q6 the stepping member, or thedog 45, will be engaged by the next succeeding tooth of the escapementwheel and the )laten carrier and platen will be fed a unit orlletterspace distance leftward across the top plate. 1t will further be notedthat as soon as the holding dog 44 is disengaged from the escapementwheel it will be swung by its spring away from the dog rocker, but thatas soon as the stepping dog is engaged by the escapement Wheel, a partof said stepping dog will swing'said olding dog back again to normalposition in contact with the dog rocker.

It will furthermore be seen that I have provided in connection With acarriage feedmg mechanism Which permits a letter space movement of theplaten on the down stroke or depression of a key and which is commonlyknown as a reverse feed escapement mechanism, a stop member or back stopWhich is connected With the holding dog mounted on the vibratory dogcarrier and is adapted to be automaticallypositioned to prevent reversemovement of the escapement Wheel when the carriage is returned or thrustback from the left to the right across the top plate of the machine.

Various changes in the construction of the parts and in theirarrangement may be made Without departing from the spirit and scope ofmy invention.

What I claim as new and desire to secure by Letters Patent, is1- K 1. Ina typewriting machine and in a reverse feed escapement, the combinationof a carriage, printing keys, an escapement Wheel, a vibratory dogcarrier, a pivoted spring pressed holding dog mounted thereon andnormally in engagement With the escapement Wheel, and a pivotedspring-pressed stepping dog adapted to invariably permit a letter spacemovement of the carriage upon the depression of a nger key, saidstepping dog as it moves being also adapted to move said holding dog.

2. In a typeWriting machine, the combination of a carriage,- printingkeys, an escapement Wheel, a vibratory dog carrier, a pivotedspring-pressed holding dog mounted thereon and normally in engagementWith the escapement Wheel, a pivoted springpressed stepping dog adaptedto invariab y permit a letter space movement of the carriage upon thedepression of a finger key, an arm ment thereof When the carriage isretracted.

3. In a typeWriting machine, the combination of a carriage, printingkeys, an escapement Wheel, la vibratory dog carrier, a pivotedspring-pressed holding dog mounted thereon and normally in engagementwith the escapement Wheel, and aV ivoted sprin pressed stepping dogadapted to invariabIy permit a letter space movement of the carriageupon thel depression of a finger key, said stepping dog being providedWith an arm adapted to control said holding dog.

4. In a typeWriting. machine and in a reverse feed escapement, thecombination of a carriage, printing keys, an escapement Wheel, avibratory dog carrier, a pivoted spring pressed holding dog mountedthereon and normally in engagement With the escapement Wheel, and apivoted spring-pressed stepping dog adapted to invariably permit aletter space movement of the carriage upon the depression of a fingerkey, said stepping dog as it moves being also adapted to move saidholding dog.

Signed at Syracuse, in the county of Onondaga, and State of New York,this 14th day of August A. D. 1905.

4 EDWIN E. BARNEY.

Witnesses:

JOHN S. MITCHELL, HARRY A. ARMENT.

45 connected with said stepping dog and adapt-

